I disconnected the engine breather pipe from the inlet just before the throttle valve on my 2000 1.8 GDI. I fitted a small filter on the end of the pipe and blocked off the air feed. I have heard that even that it feeds air to the top of the cam covers oil still gets in the inlet tract. This is very true as I can see oil in the small filter I fitted and this oil is deposited on the throttle valve and then eventually you get problems. So I will now fit a oil catch tank instead of a filter. I already have a oil catch tank fitted on the end of the PCV ( POSITIVE CRANKCASE VENTILATION ) valve pipe which did feed crankcase gases back into the inlet manifold. Because of the direct injection the cleaning properties of fuel cannot keep the inlet valves clean so they get coked up. I have emptied the oil catch tank fitted on a couple of occasions and found a mixture of oil and water. I presume the water is condensing from the air possibly being drawn in. I am doing this to combat the engine coking up. Will tackle the EGR valve next. Anyone else modified or blocked off the EGR VALVE ?

Hello from Norway!

Its an interesting subject you are talking about. As you can see I have ther same car as you, mine has only 57000Km on the counter so I have not experienced any problems most GDI owners have.

Have you been on the German website www.dreamcarisma.de ? On this site they have a "Do it your self" topic. There is an how to close the AGR / EGR valve, this is also discussed in the forum. My problem is that I dont understand a word of it :(

check out this link (if you havent already found it)

http://www.dreamcarisma.de/mitsubishi/work...rschliessen.php

If you are going to close the EGR valve please keep us updated.

regards

sounds good, could you send me a pic of the things you've done

radeon, i looked at that website but didn't really understand it, he took out a gasket? but i don't see where he was going from that?

Good morning!

As far as I understand what they are doing: They make a new gasket without a hole in the middle. That way no exhaust gas are coming back to the air inlet manifoild. The egr valve operates as "normal".

regards